Top Software Engineer Jobs in New York City, NY

Build the fintech company’s MVP end to end across web, mobile, backend, data, infrastructure, and AI agents. Own architecture, cloud, security, observability, regulated money movement integrations, and compliance guardrails. Establish engineering standards, coordinate contract engineers, and ship reliable production systems quickly. The role begins as the first technical hire with a path toward technical leadership.

Embed with strategic enterprise accounts to architect and tune end-to-end deployments, write production code across Alloy's stack, serve as the technical partner for customers, own engineering QBRs and on-call escalations, and produce reusable platform primitives and documentation to accelerate future deployments.

Lead the development of an AI-powered platform for senior mental health, building systems for patient experience, and mentoring the engineering team.

The Founding Engineer will lead the development of Sailor Health's AI-powered platform, building systems for patient care and mentor the engineering team.

Build and launch core products from zero to one, make foundational architecture decisions, work across the technology stack, and partner closely with founders and customers. The role involves solving ambiguous technical and product challenges, establishing engineering practices, and helping hire and grow the future engineering organization at early-stage, venture-backed companies.

Build and own Chamelio’s technical go-to-market infrastructure, including CRM, enrichment, outbound, product analytics, AI agents, API integrations, automations, data pipelines, lead scoring, attribution, and reporting. The role requires independently designing and deploying scalable workflows across tools such as Clay, Attio, Smartlead, PostHog, n8n, and Zapier, while creating custom code and integrations where needed.

Own and build production UI for a fund administration product: design and implement dense, high‑stakes financial workflows, prototype in code, define and maintain the design system, and create human–AI interaction patterns for human-in-the-loop review. Partner closely with product, ops, customers, and engineering to translate complex workflows into polished, trustworthy interfaces.

Own customer problems from concept through production by building full-stack financial systems powered by AI agents. Develop workflows for invoicing, collections, payroll, reporting, and month-end close; create integrations with banking, accounting, payroll, payment, and communication platforms; and architect secure, auditable, reliable infrastructure. Collaborate directly with founders and finance teams, design intuitive interfaces, iterate based on customer feedback, and help establish the startup’s engineering culture and technical standards.

Own product features end-to-end across web app, GraphQL API, and embeddable components. Design schemas and APIs, build backend and frontend, write tests, monitor real-user behavior, and ship weekly. Establish shared component library, design system, and testing patterns. Optimize performance and leverage AI tooling to accelerate engineering and product collaboration.

Embed with customers to design, build, and deploy GC AI integrations into legal workflows. Develop production-grade API/webhook integrations, troubleshoot deployments, create reference implementations and documentation, and feed product insights back to Engineering to improve the platform. Travel to customer sites up to 25% as needed.

Own the development of a 24/7 agent that monitors retailer drops, detects scarce inventory, automates checkout, tracks portfolios, and supports real-time pricing infrastructure. The role offers high autonomy, broad technical ownership, and responsibility for reliable production systems serving thousands of collectors. This is a full-time, in-person position in New York City.

Build and ship optimization algorithms and integrations for enterprise trucking fleets. Act as a technical generalist: implement product features, work directly with clients to gather requirements, iterate quickly, and contribute to long-term product vision. Work in a fast-paced startup using Python and TypeScript.

Architect the low-latency core of a trading engine, design matching logic, and optimize execution flows in a fast-paced environment.

Architect and implement smart contract infrastructure for a perpetual futures platform, focusing on trading, margin, liquidation, and smart contract security.

The Fullstack Web3 Engineer will develop core product functionality across the stack, collaborating with the CTO to enhance a global trading platform.

You'll lead the design and development of the frontend for a mobile-first trading product, ensuring clarity and performance while collaborating with teams.

Seeking a founding engineer to develop AI product systems, build prototypes, optimize backend infrastructure, and contribute to product strategy. Must work well across diverse tech areas with a focus on consumer experiences. Passion for fashion and technology preferred.

As a Founding Engineer, you will own agent systems, architect for reliability, run fast experiments, collaborate with founders, and set engineering culture.

Founding GTM Engineer builds and ships go-to-market systems that drive revenue: routing, scoring, outreach, automation, AI agents, and measurement. You'll integrate CRM/data stacks, push AI into production, co-own GTM metrics with Sales and Marketing, and hire as the function scales.

As the NYC founding engineer, you'll own core systems for global payroll and money movement, ship end-to-end product features, help lead a 5+ engineer India team, build the in-person NYC engineering culture, work directly with the CEO, and influence hiring and roadmap execution.

Build and own Hera's backend systems: design fault-tolerant services, reliable data infrastructure, and consumer-grade APIs. Shape data handling for medical, billing, and operational workflows. Improve engineering rigor via testing, performance tuning, and maintainable architectures. Enable capture and compounding of expert knowledge to scale care delivery.

As a Founding Engineer, you'll architect and build production systems, lead on infrastructure and backend, and help shape the engineering culture while innovating in AI for insurers.

The Founding Full Stack Engineer will drive product development for a prediction market trading platform, focusing on code quality, system architecture, and user experience.

Own complex enterprise AI deployments from discovery through production. Work directly with customers to understand undocumented workflows, build integrations, workflows, tooling, and product capabilities, and debug deployment blockers across voice, messaging, APIs, data, LLMs, and orchestration systems. Convert one-off solutions into reusable product and infrastructure primitives. As the function grows, establish deployment playbooks, hire and lead the Forward Deployed Engineering organization, and coordinate with Product, Engineering, Sales, and Customer Success.

Build and validate AI-native tooling for utility power-engineering and go-to-market teams. The role combines customer discovery, workflow analysis, Python and SQL development, data investigation, prototypes, integrations, debugging, and production-quality software. You will partner with Product and Engineering, dogfood tools on live customer problems, define requirements and quality standards, lead rollout and adoption, train users, and establish the company’s forward-deployed engineering operating model. Regular customer and U.S. team travel is required.